CN109942932A - A kind of heatproof high-voltage cable insulating material and preparation method thereof - Google Patents
A kind of heatproof high-voltage cable insulating material and preparation method thereof Download PDFInfo
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- CN109942932A CN109942932A CN201910130909.1A CN201910130909A CN109942932A CN 109942932 A CN109942932 A CN 109942932A CN 201910130909 A CN201910130909 A CN 201910130909A CN 109942932 A CN109942932 A CN 109942932A
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Abstract
The invention proposes a kind of heatproof high-voltage cable insulating material and preparation method thereof, the proportion of the Insulation Material by weight is as follows: 88-102 parts of low density polyethylene of high-tension cable, 1-8 parts of polypropylene PP, 0.05-0.35 parts of antioxidant and 1.0-3.2 parts of crosslinking agent, Insulation Material provided by the invention disruptive field intensity and resistivity with higher at high temperature, with good processing performance, suitable for large-scale production, content of crosslinking agent is low simultaneously, the degassing time for substantially reducing electric cable with large cross-section is widely used as high-voltage DC cable insulating material.
Description
Technical field
The present invention relates to a kind of high-voltage cable insulating material and preparation method thereof, and in particular to a kind of heatproof high-voltage cable insulating
Material and preparation method thereof.
Background technique
Realize remote, large capacity, low-loss, efficient power transmission and wind-power electricity generation, hydroelectric generation, the sun
The flexible DC transmission technology of the grid-connected optimal selections of renewable new energies such as energy power generation is the basis for realizing energy source interconnection on a large scale,
And direct current cables is then one of the critical equipment for realizing flexible DC transmission.XLPE extruding cable big, weight with transmission line capability
Gently, the advantages such as structure is simple, convenient for installation and maintenance, processing and manufacturing expense is low, in recent years, crosslinked polyethylene (XLPE) extruding cable
It flourishes, is the prior development direction of the following direct current cables gradually instead of the oil-impregnated paper insulation cable of early stage.
High voltage direct current cable in the process of running, will cause the space charge accumulation inside insulating materials, thus with incoming call
Field distortion effect, the aging of accelerated material, and high voltage direct current cable XLPE Insulation Material need still to have reason at high temperature
The insulation performance thought, to make cable operating temperature with higher, the temperature effect of XLPE Insulation Material is obvious at present, in high temperature
The dc breakdown field strength of lower material reduces obvious and its DC conductivity and increases comparatively fast.The prior art in order to guarantee material have foot
Enough degrees of cross linking and heat resistance add more crosslinking agent and result in cross-linking process by-products content height, so as to cause space charge
Accumulation, influences the electric property of product.
Summary of the invention
In view of the deficiencies of the prior art, it is lower to provide a kind of content of crosslinking agent by the present invention, with higher at high temperature to hit
Wear the heatproof high-voltage cable insulating material and preparation method thereof of field strength and resistivity.
A kind of heatproof high-voltage cable insulating material, the proportion of the Insulation Material by weight are as follows: high-tension cable is with low close
88-102 parts of polyethylene LDPE of degree, 1-8 parts of polypropylene PP, 0.05-0.35 parts of antioxidant and 1.0-3.2 parts of crosslinking agent.
Further, the proportion of the Insulation Material by weight is as follows: high-tension cable low density polyethylene
90-100 parts, 1-6 parts of polypropylene PP, 0.05-0.25 parts of antioxidant and 1.0-3.0 parts of crosslinking agent.
Further, the proportion of the Insulation Material by weight is as follows: high-tension cable low density polyethylene
95-99 parts, 1-5 parts of polypropylene PP, 0.15-0.25 parts of antioxidant and 1.0-1.5 parts of crosslinking agent.
Further, the antioxidant is the thiobis phenol generalization of 161-164 DEG C of fusing point and content of ashes less than 0.05%
Object is closed, the crosslinking agent is 41-42 DEG C of fusing point, relative density 1.08-1.09g/cm3It is greater than 99.9% peroxide with purity
Class compound.
Further, the antioxidant be 4,4'- thiobis (3 methy 6 tert butyl phenol) or antioxidant 300, it is described
Crosslinking agent is cumyl peroxide or DCP.
Further, the high-tension cable is 0.92-0.93g/cm with low density polyethylene (LDPE) density3, molecular weight distribution model
Enclose 5.5-6.5,108-110 DEG C of fusing point, melt index 1.9-2.1g/min.
Further, the polypropylene is isotactic polypropylene, and fusing point is 164-170 DEG C, and isotactic index >=96% stretches strong
Spend > 28Mpa, content of ashes≤0.03%.
A kind of preparation method of heatproof high-voltage cable insulating material includes:
(1) under room temperature, with the blender mixing low density polyethylene (LDPE) and acrylic resin of 100-200r/min revolving speed；
(2) gained mixed material is under 185-195 DEG C, screw speed 180-200r/min through 500 mesh screen melting extrusions
And cooling and dicing；
(3) 24 hours will be kept the temperature at 70-80 DEG C after gained blank incorporation crosslinking agent；
(4) it is cooled to room temperature to obtain Insulation Material.
Compared with the latest prior art, technical solution provided by the invention has the advantages that
(1) high-voltage DC cable insulating material provided by the invention is using ldpe resin as base-material, with Gao Rong
The polypropylene versus polyethylene base-material of point carries out blending and modifying, is squeezed out using double screw extruder melt blending, contaminant filter and cold
But it is granulated, modified crosslinking polyethylene Insulation Material is made by absorption technique after crosslinking agent, disruptive field intensity at high temperature is up to
429kV/mm, resistivity are up to 8.9 Ω m, and space charge depression effect is excellent；
(2) high-voltage DC cable insulating material provided by the invention reduces the temperature-independent effect of traditional material, improves
The insulation performance of material at high temperature, while content of crosslinking agent is low, substantially reduces the degassing time of electric cable with large cross-section；
(3) resin compatible of high-voltage DC cable insulating material provided by the invention is good, has good processing technology special
Property, it can avoid complicated processing process, improve production efficiency, be conducive to the production that is switched on for a long time.
Specific embodiment
Technical solution provided by the invention is clearly and completely described below, it is clear that described embodiment is only
A part of the invention, rather than all.
Test method:
Precrosslink material vulcanizing press prepared by the present invention is hot-forming: 10MPa precompressed 5 minutes at 130 DEG C first,
Then under the conditions of 180 DEG C of 15MPa after pressurization crosslinking 15 minutes cooling down to room temperature, be made radius be 15mm, with a thickness of
The thin rounded flakes sample of 0.2mm.It is deaerated after processing in 2 hours at 80 DEG C of gained XLPE sample, carries out dc breakdown under different temperatures
Field strength and resistivity measurement.
Using high pressure battery of tests device to insulating materials carry out dc breakdown test, output DC voltage be 0~
200kV, selecting diameter is ball-ball electrode of 10mm, and electrode material is brass.By the way of continuously boosting, testing film examination
The diameter of sample is 15cm, and with a thickness of 0.20 ± 0.02mm, every kind of sample at least measures 10 data points.The disruptive field intensity of sample is
The ratio of breakdown voltage and sample thickness, statistical data are analyzed using Weibull.
Using the resistivity of high-voltage DC power supply, thermostatic drying chamber (shielded box) and 3 electrode test systematic survey materials, survey
Amount electrode diameter is 15cm.Quasi-steady state electric current is using Keithley 6517A amperometric measurement and cooperates data logging software.Examination
Sample tests the resistivity of material under 70 DEG C of 30kV/mm field strength, each using step boosting mode with a thickness of 0.20 ± 0.02mm
The sampling time of sample is 3600s, and the electric property of insulating materials is as shown in table 1.
Embodiment 1
Low density polyethylene (LDPE) and acrylic resin are weighed according to weight ratio 99:1, using high-speed mixer in room temperature revolving speed
It is pre-mixed under 150 revs/min；Then double screw extruder is added by weight 100:0.2 in premix and antioxidant, squeezed
Temperature is 185 DEG C out, screw speed 180r/min, it is ensured that resulting material is by 500 mesh screens by mould after molten homogeneous is kneaded
Head squeezes out, and modified poly ethylene particle is obtained after cooling and dicing；By peroxide cross-linking agent and modified poly ethylene particle by weight
Amount is mixed than 100:1.6, is absorbed after carrying out at a temperature of 80 DEG C, and heat preservation is cooled to room temperature after fully absorbing to crosslinking agent, is prepared
Precrosslink Insulation Material.
Embodiment 2
Low density polyethylene (LDPE) and acrylic resin are weighed according to weight ratio 97:3, using high-speed mixer in room temperature revolving speed
It is pre-mixed under 200 revs/min；Then double screw extruder is added by weight 100:0.15 in premix and antioxidant,
Extrusion temperature be 190 DEG C, screw speed 200r/min, it is ensured that molten homogeneous be kneaded after resulting material by 500 mesh screens by
Die head squeezes out, and modified poly ethylene particle is obtained after cooling and dicing；Peroxide cross-linking agent and modified poly ethylene particle are pressed
Weight ratio 100:1.2 mixing, absorbs after carrying out at a temperature of 70 DEG C, and heat preservation is cooled to room temperature after fully absorbing to crosslinking agent, makes
Standby precrosslink Insulation Material.
Embodiment 3
Low density polyethylene (LDPE) and acrylic resin are weighed according to weight ratio 95:5, using high-speed mixer in room temperature revolving speed
It is pre-mixed under 200 revs/min；Then double screw extruder is added by weight 100:0.25 in premix and antioxidant,
Extrusion temperature be 195 DEG C, screw speed 190r/min, it is ensured that molten homogeneous be kneaded after resulting material by 500 mesh screens by
Die head squeezes out, and modified poly ethylene particle is obtained after cooling and dicing；Peroxide cross-linking agent and modified poly ethylene particle are pressed
Weight ratio 100:1.0 mixing, absorbs after carrying out at a temperature of 75 DEG C, and heat preservation is cooled to room temperature after fully absorbing to crosslinking agent, makes
Standby precrosslink Insulation Material.
The electric property of 1 XLPE insulating materials of table
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Mind and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of heatproof high-voltage cable insulating material, which is characterized in that the proportion of the Insulation Material by weight is as follows: high-voltage electricity
88-102 parts of low density polyethylene of cable, 1-8 parts of polypropylene PP, 0.05-0.35 parts of antioxidant and crosslinking agent 1.0-3.2
Part.
2. heatproof high-voltage cable insulating material as described in claim 1, which is characterized in that the Insulation Material matching by weight
Than as follows: 90-100 parts of low density polyethylene of high-tension cable, 1-6 parts of polypropylene PP, 0.05-0.25 parts of antioxidant and
1.0-3.0 parts of crosslinking agent.
3. heatproof high-voltage cable insulating material as described in claim 1, which is characterized in that the Insulation Material matching by weight
Than as follows: 95-99 parts of low density polyethylene of high-tension cable, 1-5 parts of polypropylene PP, 0.15-0.25 parts of antioxidant and
1.0-1.5 parts of crosslinking agent.
4. heatproof high-voltage cable insulating material as described in claim 1, which is characterized in that the antioxidant is 161-164 DEG C molten
Point and thiobis phenolic compound of the content of ashes less than 0.05%, the crosslinking agent are 41-42 DEG C of fusing point, relative density
1.08-1.09g/cm3It is greater than 99.9% peroxide compounds with purity.
5. heatproof high-voltage cable insulating material as claimed in claim 5, which is characterized in that the antioxidant is 4,4'- thiobis
(3 methy 6 tert butyl phenol) or antioxidant 300, the crosslinking agent are cumyl peroxide or DCP.
6. heatproof high-voltage cable insulating material as described in claim 1, which is characterized in that the high-tension cable low density polyethylene
Alkene density is 0.92-0.93g/cm3, range of molecular weight distributions 5.5-6.5,108-110 DEG C of fusing point, melt index 1.9-2.1g/
min。
7. heatproof high-voltage cable insulating material as described in claim 1, which is characterized in that the polypropylene is isotactic polypropylene,
Fusing point is 164-170 DEG C, isotactic index >=96%, tensile strength > 28Mpa, content of ashes≤0.03%.
8. the preparation method of any heatproof high-voltage cable insulating material as described in claim 1-3, which is characterized in that the method
Include:
(1) under room temperature, with the blender mixing low density polyethylene (LDPE) and acrylic resin of 100-200r/min revolving speed；
(2) gained mixed material is under 185-195 DEG C, screw speed 180-200r/min through 500 mesh screen melting extrusions and cold
But pelletizing；
(3) 24 hours will be kept the temperature at 70-80 DEG C after gained blank incorporation crosslinking agent；
(4) it is cooled to room temperature to obtain Insulation Material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910130909.1A CN109942932A (en) | 2019-02-22 | 2019-02-22 | A kind of heatproof high-voltage cable insulating material and preparation method thereof |
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| CN201910130909.1A CN109942932A (en) | 2019-02-22 | 2019-02-22 | A kind of heatproof high-voltage cable insulating material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894320A (en) * | 2019-11-25 | 2020-03-20 | 天津大学 | Method for improving charge characteristic of insulation space of polypropylene high-voltage direct-current cable |
| CN111471236A (en) * | 2020-04-10 | 2020-07-31 | 天津大学 | Polypropylene cable insulating material and preparation method and application thereof |
| CN111875806A (en) * | 2020-07-30 | 2020-11-03 | 全球能源互联网欧洲研究院 | Application of Ziegler-Natta catalyst, method for preparing cable plant flexible joint and insulating layer thereof, and cable plant flexible joint |
| CN113087993A (en) * | 2021-04-09 | 2021-07-09 | 全球能源互联网研究院有限公司 | Insulating material with scorch resistance and preparation method thereof |
| CN113563666A (en) * | 2021-07-09 | 2021-10-29 | 赣州能之光新材料有限公司 | High-temperature-resistant grade polypropylene cable insulating material and preparation method thereof |
| CN113801385A (en) * | 2020-06-11 | 2021-12-17 | 全球能源互联网研究院有限公司 | Crosslinkable polyethylene insulating material for high-voltage cable and preparation method thereof |
| CN114927264A (en) * | 2022-05-31 | 2022-08-19 | 中天科技装备电缆有限公司 | Waterproof photovoltaic cable and preparation method thereof |
| CN114927264B (en) * | 2022-05-31 | 2024-05-31 | 中天科技装备电缆有限公司 | Waterproof photovoltaic cable and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536777A (en) * | 1993-02-26 | 1996-07-16 | Fujikura Ltd. | Polyethylene composition for use in insulations and joints of extra-high voltage power cables, and an extra-high voltage power cable and joint therefor employing this polyethylene composition |
| CN103483662A (en) * | 2013-08-30 | 2014-01-01 | 江苏达胜高聚物有限公司 | Crosslinked polyethylene cable insulation material |
| CN108285565A (en) * | 2018-01-12 | 2018-07-17 | 安徽滁州德威新材料有限公司 | Extra-high-tension cable ultra-clean processes for chemically crosslinked polyethylene Insulation Material and preparation method |
| CN108623877A (en) * | 2018-04-17 | 2018-10-09 | 全球能源互联网研究院有限公司 | A kind of high voltage direct current cable insulating materials and preparation method thereof |
| CN109265791A (en) * | 2018-08-01 | 2019-01-25 | 西安交通大学 | A kind of high-voltage DC cable insulating material and preparation method thereof |
-
2019
- 2019-02-22 CN CN201910130909.1A patent/CN109942932A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536777A (en) * | 1993-02-26 | 1996-07-16 | Fujikura Ltd. | Polyethylene composition for use in insulations and joints of extra-high voltage power cables, and an extra-high voltage power cable and joint therefor employing this polyethylene composition |
| CN103483662A (en) * | 2013-08-30 | 2014-01-01 | 江苏达胜高聚物有限公司 | Crosslinked polyethylene cable insulation material |
| CN108285565A (en) * | 2018-01-12 | 2018-07-17 | 安徽滁州德威新材料有限公司 | Extra-high-tension cable ultra-clean processes for chemically crosslinked polyethylene Insulation Material and preparation method |
| CN108623877A (en) * | 2018-04-17 | 2018-10-09 | 全球能源互联网研究院有限公司 | A kind of high voltage direct current cable insulating materials and preparation method thereof |
| CN109265791A (en) * | 2018-08-01 | 2019-01-25 | 西安交通大学 | A kind of high-voltage DC cable insulating material and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894320A (en) * | 2019-11-25 | 2020-03-20 | 天津大学 | Method for improving charge characteristic of insulation space of polypropylene high-voltage direct-current cable |
| CN111471236A (en) * | 2020-04-10 | 2020-07-31 | 天津大学 | Polypropylene cable insulating material and preparation method and application thereof |
| CN113801385A (en) * | 2020-06-11 | 2021-12-17 | 全球能源互联网研究院有限公司 | Crosslinkable polyethylene insulating material for high-voltage cable and preparation method thereof |
| CN111875806A (en) * | 2020-07-30 | 2020-11-03 | 全球能源互联网欧洲研究院 | Application of Ziegler-Natta catalyst, method for preparing cable plant flexible joint and insulating layer thereof, and cable plant flexible joint |
| CN113087993A (en) * | 2021-04-09 | 2021-07-09 | 全球能源互联网研究院有限公司 | Insulating material with scorch resistance and preparation method thereof |
| CN113563666A (en) * | 2021-07-09 | 2021-10-29 | 赣州能之光新材料有限公司 | High-temperature-resistant grade polypropylene cable insulating material and preparation method thereof |
| CN114927264A (en) * | 2022-05-31 | 2022-08-19 | 中天科技装备电缆有限公司 | Waterproof photovoltaic cable and preparation method thereof |
| CN114927264B (en) * | 2022-05-31 | 2024-05-31 | 中天科技装备电缆有限公司 | Waterproof photovoltaic cable and preparation method thereof |
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Application publication date: 20190628 |
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